On the 28 Jun 1914 the Archduke Franz Ferdinand of Austria and his wife Sophie were assassinated in Sarajevo, Bosnia and Herzegovina, by Gavrilo Princip, a Bosnian Serb nationalist. This incident lit the fuse that started the Great War. In what is probably one of history's most momentous events, the Archduke's chauffeur had missed his turn and driven the car down the wrong street right by the point where the would-be assassin just happened to be standing.
This event merely precipitated a conflict between the major European powers, which by then had already become inevitable. The main causes were the aspirations, fears and misunderstandings of Britain, France, Russia and Germany. All of them, in their different ways, considered that their vital interests were threatened.
Austria-Hungary blamed Serbia for the assassination and attacked on the 28 Jul 1914. Russia came to the assistance of Serbia and Germany to Austria-Hungary. Germany then declared war on France because it was Russia's ally and Britain declared war on Germany when it invaded Belgium and Luxembourg on its advance towards Paris. Consequently, the date when the Great War (World War One) actually started was the 28 Jul 1914, although Britain was not involved for another seven days when Germany violated Belgian neutrality.
The British declaration of war on Germany was on the 4 Aug 1914 at 11:00pm (midnight in Berlin) and it ended 4 years and 99 days later with an Armistice, which came into effect on the 11 Nov 1918 at 11:00am.
At the Paris Peace Conference, convened January in 1919, the Treaty of Versailles ended the state of war between Germany and the Allied Powers. It was signed on the 28 Jun 1919, five years to the day after the assassination of Archduke Franz Ferdinand. The negotiations took place in the Hall of Mirrors in the Palace of Versailles. The treaty became effective on the 10 Jan 1920 following its ratification by the governments concerned, namely: Germany (Central Power), France, British Empire, Italy, United States of America and Japan (Allied Powers). Other treaties resulting from the Paris Peace Conference were: St Germain (Austria), Trianon (Hungary), Neuilly (Bulgaria) and Sèvres (Turkey/Turkish Empire), all Central Powers. The Treaty of Brest-Litovsk was a separate treaty signed on the 3 Mar 1918 between the new Soviet Government of Russia and the Central Powers.
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Timeline
19 Apr 1839 | The Treaty of London was signed. Under the terms of this treaty the European powers recognised and guaranteed the independence and neutrality of Belgium and
confirmed the independence of the German-speaking part of Luxembourg.
Article VII required Belgium to remain perpetually neutral and by implication committed the signatory powers to guard that neutrality in the event of invasion.
The treaty was between Great Britain, Austria, France, Prussia and Russia on the one part and Belgium on the other. The Plenipotentiaries who signed the treaty were:
Lord Palmerston, British Foreign Secretary.
Senfft von Pilsach, Austrian Minister.
H. Sebastiani, French Minister.
Gabriele von Bulow, Prussian Minister
Carlo Andrea Pozzo di Borgo, Russian Diplomat.
Sylvan van de Weyer, Belgium Ambassador to Britain.
On the 4 Aug 1914 the German Chancellor, Theobald von Bethmann-Hollweg, described the Treaty of London as “a scrap of paper” in his final meeting with the British Ambassador to Germany, Sir Edward Goschen. |
28 Jun 1914 | In Sarajevo, Bosnia and Herzegovina, Gavrilo Princip assassinated Archduke Franz Ferdinand who was the heir presumptive to the Austro-Hungarian throne. The assassination of the Archduke started the Great War and the unparalleled carnage that was to follow. |
28 Jul 1914 | The Great War effectively commenced when Austria-Hungary attacked Serbia but Britain was not involved for another seven days. |
1 Aug 1914 | Germany declared war on Russia. |
3 Aug 1914 | Germany declared war on France. |
4 Aug 1914 | 11:00pm in London, midnight in Berlin. Britain declared war on Germany because of its violation of Belgian neutrality under the terms of the Treaty of London of 1839. The Foreign Secretary, Sir Edward Grey, commented that, “The lamps will go out all over Europe, we shall not see them lit again in our lifetime.” ![]() |
7 Aug 1914 | The British Expeditionary Force (BEF) crossed to France to try and halt the German advance as they implemented their Schlieffen Plan.
A series of battles ensued, collectively known as the Battle of Frontiers. |
21 Aug 1914 | L/14196 Private John Parr of the 4th Battalion, Middlesex Regiment is believed to be the first British casualty of the war. He was buried in the St Symphorien Military Cemetery in Belgium. Grave Ref. I.A.10. |
23 Aug 1914 | Japan declared war on Germany. It declared war with Austria-Hungary on the 25 Aug 1914. |
23 Aug 1914 to 24 Aug 1914 |
Battle of Le Cateauwas fought during which the 4th Division was overwhelmed. The 1914 Star, also known as the Mons Star, was awarded for military service in France and Belgium between the 5 Aug 1914 and midnight on the 22 Nov 1914. That is, from Britain’s original participation in the war until the final day of the First Battle of Ypres. |
28 Aug 1914 | |
6 Sep 1914 to 12 Sep 1914 |
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19 Oct 1914 to 22 Nov 1914 |
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29 Oct 1914 | Turkey entered the war on the side of the Central Powers. |
21 Dec 1914 | The first German air raid on Britain occurred. |
22 Apr 1915 to 25 May 1915 |
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25 Apr 1915 to 9 Jan 1916 |
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7 May 1915 | |
25 May 1915 | Herbert Henry Asquith’s Coalition Government was formed as a multi-party wartime coalition government. It was dissolved on the 5 Dec 1916. |
28 Jun 1915 | |
25 Sep 1915 to 18 Oct 1915 |
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10 Dec 1915 | Field Marshal Sir John French was replaced by Field Marshal Sir Douglas Haig as Commander-in-Chief of the British Expeditionary Force (BEF).
![]() ![]() Left: Field Marshal Sir John French.
Right: Field Marshal Sir Douglas Haig. |
21 Feb 1916 to 20 Dec 1916 |
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31 May 1916 to 1 Jun 1916 |
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5 Jun 1916 | Field Marshal Horatio Herbert Kitchener, 1st Earl Kitchener, died on board HMS Hampshire when it struck a German mine 1½ miles west of Orkney, Scotland. |
24 Jun 1916 to 30 Jun 1916 |
British and French Forces began a seven day artillery bombardment of the German front line on the Somme, which was a prelude to the Battle of the Sommethat commenced on 1 Jul 1916. |
1 Jul 1916 | From 7:30am on 1 Jul 1916 until 18 Nov 1916. |
15 Sep 1916 | The first British tanks went into action during the Battle of Flers-Courcelette, which was a subsidiary action during the Battle of the Somme. 49 tanks were made available for the offensive but only 15 of them were able to participate in the action because of their unreliability. |
6 Dec 1916 | David Lloyd George replaced Herbert Henry Asquith as Prime Minister. |
6 Apr 1917 | The USA declared war on Germany. |
9 Apr 1917 to 12 Apr 1917 |
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7 Jun 1917 to 14 Jun 1917 |
Battle of Passchendaele. |
31 Jul 1917 to 10 Nov 1917 |
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20 Nov 1917 | From 6:30am on 20 Nov 1917 until 7 Dec 1917. |
7 Dec 1917 | The USA declared war on Austria-Hungary. |
15 Dec 1917 | Russia signed a ceasefire with Germany. |
3 Mar 1918 | Russia formally withdrew from the Great War when the Treaty of Brest-Litovsk was signed. Under the terms of this treaty, Russia lost control of Poland, Latvia, Estonia, Lithuania, Ukraine, Belarus and its Caucasus provinces of Kars and Batum. |
1 Apr 1918 | The Royal Air Force (RAF), the world’s first independent air force, was founded by an amalgamation of the Royal Flying Corps and the Royal Naval Air Service. The first person to hold the position of Chief of Air Staff was Major General Hugh Montague Trenchard who then became Marshal of the Royal Air Force. |
9 Apr 1918 | The Germans started an offensive in Flanders, which was initially successful. However, on the 15 Jul 1918 the Second Battle of the Marnestarted. The outcome of this battle was the collapse of the German armies and it ended on the 6 Aug 1918 when it brought to an end the last German offensive of the war. |
17 Jul 1918 | |
8 Aug 1918 | From 4:20am on 8 Aug 1918 until 11 Aug 1918. |
11 Nov 1918 | At 5:10am on the 11 Nov 1918. After negotiations, it was agreed that a ceasefire (Armistice) was to come into effect at 11:00am. |
11 Nov 1918 | At 9:30am on the 11 Nov 1918. L/12643 Private George Edwin Ellison of the 5th (Royal Irish) Lancers is believed to be the last British casualty of the war. He was buried in the St Symphorien Military Cemetery in Belgium. Grave Ref. I.B.23. The grave of Private George Edwin Ellison is near the grave of the first casualty, Private John Parr. |
11 Nov 1918 | At 11:00am on the 11 Nov 1918.
The Armistice came into effect.
![]() Marshal Ferdinand Foch's personal headquarters railway carriage, 11 Nov 1918. At this time the railway carriage was at Rethondes in the Compiègne Forest, Northern France. The scene is after the Armistice document had been signed inside the carriage. Admiral Sir George Hope, Deputy First Sea Lord. |
21 Jun 1919 | The Imperial German Navy’s High Seas Fleet was scuttled by its sailors while held at Scapa Flow in the Orkney Islands of Scotland. The fleet was interred there under the terms of the Armistice on the 11 Nov 1918. In the confusion, nine German sailors were shot dead and they were the last casualties of the Great War. |
28 Jun 1919 | ![]() Signing of the Treaty of Versailles in the Hall of Mirrors, 28 Jun 1919. This location was chosen deliberately, as it was also where the German Empire had been proclaimed on the 18 Jan 1871 combining Prussia and the surrounding German states under William I. The treaty ended the Great War and imposed harsh terms on Germany, including war reparations, disarmament, territorial losses and the loss of its overseas colonies. Many historians assert that the combination of harsh terms and subsequent lax enforcement of its provisions paved the way for World War II in 1939. The treaty also founded the League of Nations, an international organisation aimed at promoting international cooperation and peace. This was the precursor of the United Nations founded in 1945. |
19 Jul 1919 | |
10 Jan 1920 | The Treaty of Versailles became effective following its ratification by all the governments concerned. |